view of the historic center of porto, the douro river and the typical rabelo boats used to carry port wine

architecture attraction bank barrel boat building city cloud clacopy rigos company culture district dos douro episcopal europe headquarters heritage hill historic history house landmark light monument old palace path pena port porto portugal portuguese portwine promenade quai rabelo residential ribeira river ship shipping site sky skyline torre tourism tourist tower town tradition traditional transport travel unesco vacation ventos water wine wooden world